There 's been a sharp spike in radiation levels measured in the pipes and containers holding water at the crippled Fukushima Daiichi nuclear plant in Japan .

But the company in charge of cleaning it up says that only a single drop of the highly contaminated water escaped the holding tanks .

Tokyo Electric Power Company said it is confident it can provide safety for workers dealing with the problem .

`` We will find out the cause of this issue and make proper counter measures immediately , and continue to make every effort to secure safety of workers , '' the company said in a statement released Sunday .

TEPCO found high radiation readings at the contaminated water storage tanks and pipe Saturday . The four locations are the bottom of three tanks and a pipe connecting tanks in separate area .

The highest reading as 1800 millisieverts per hour at the bottom fringe of the tank . 220 and 70 mSv were measured at the bottom of other two tanks . And TEPCO said they found a dried stain under the pipe with 230 mSv/h radiation measurement .

One drop of liquid fell when a staff member pressed on insulation material around the pipe . But TEPCO said no contaminated water leak is expected as there were no change in the water level in tanks .

The enormous tanks are identical to the container that was announced last week to have leaked 300 tons of highly toxic water and sparking a hike to the threat level to `` serious . ''

TEPCO will investigate the cause and look further if there were any leakage .

But TEPCO also took issue with reporting by some news outlets that the new radiation levels were high enough to cause death after several hours of exposure .

It said the highest levels measured were so-called beta radiation , which quickly dissipates over short distances and is easily shielded through the use of thin sheets of metal and foil .

`` Since beta radiation is weak and can be blocked by a thin metal sheet such as aluminum , we think that we can control radiation exposure by using proper equipments and cloths , '' the company added .

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TEPCO found high radiation readings Saturday

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It said the highest levels measured were so-called beta radiation